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Jeremy Reizenstein authored
Summary: Add ability to ask a Meshes if it already has normals. If it does, then requesting normals will not trigger a calculation. MeshesFormatInterpreters will therefore be able to decide whether to save normals. Reviewed By: theschnitz, nikhilaravi Differential Revision: D27765261 fbshipit-source-id: 7c87dbf999d5616d20f5eb2c01039ee5ff65a830
66b97a0c
